npm run build elifecycle - node.js

Question

I am new to react and i want to create production build out of my code. But when i run 'npm rub build' it gives me this error in .log file
0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/Cellar/node/9.11.1/bin/node',
1 verbose cli '/usr/local/bin/npm',
1 verbose cli 'run',
1 verbose cli 'build' ]
2 info using npm#5.6.0
3 info using node#v9.11.1
4 verbose run-script [ 'prebuild', 'build', 'postbuild' ]
5 info lifecycle jenna-web-frontend#0.1.0~prebuild:
jenna-webfrontend#0.1.0
6 info lifecycle jenna-web-frontend#0.1.0~build:
jenna-web-frontend#0.1.0
7 verbose lifecycle jenna-web-frontend#0.1.0~build: unsafe-perm in
lifecycle true
8 verbose lifecycle jenna-web-frontend#0.1.0~build: PATH:
/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/markopetricic/Documents/Projects/staging-jenna-web-front/node_modules/.bin:/Library/Frameworks/Python.framework/Versions/3.6/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
9 verbose lifecycle jenna-web-frontend#0.1.0~build: CWD:
/Users/markopetricic/Documents/Projects/staging-jenna-web-front
10 silly lifecycle jenna-web-frontend#0.1.0~build: Args: [ '-c',
'react-scripts build' ]
11 silly lifecycle jenna-web-frontend#0.1.0~build: Returned: code: 1
signal: null
12 info lifecycle jenna-web-frontend#0.1.0~build: Failed to exec build
script
13 verbose stack Error: jenna-web-frontend#0.1.0 build: react-scripts
build
13 verbose stack Exit status 1
13 verbose stack at EventEmitter.
(/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:285:16)
13 verbose stack at EventEmitter.emit (events.js:180:13)
13 verbose stack at ChildProcess.
(/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:180:13)
13 verbose stack at maybeClose (internal/child_process.js:936:16)
13 verbose stack at Process.ChildProcess._handle.onexit
(internal/child_process.js:220:5)
14 verbose pkgid jenna-web-frontend#0.1.0
15 verbose cwd
/Users/markopetricic/Documents/Projects/staging-jenna-web-front
16 verbose Darwin 17.3.0
17 verbose argv "/usr/local/Cellar/node/9.11.1/bin/node"
"/usr/local/bin/npm" "run" "build"
18 verbose node v9.11.1
19 verbose npm v5.6.0
20 error code ELIFECYCLE
21 error errno 1
22 error jenna-web-frontend#0.1.0 build: react-scripts build
22 error Exit status 1
23 error Failed at the jenna-web-frontend#0.1.0 build script.
23 error This is probably not a problem with npm. There is likely
additional logging output above.
24 verbose exit [ 1, true ]
this is package.json
{
"name": "jenna-web-frontend",
"version": "0.1.0",
"private": true,
"dependencies": {
"cookieconsent": "^3.0.6",
"jquery": "^3.3.1",
"react": "^16.3.0",
"react-dom": "^16.3.0",
"react-fade-in": "^0.1.5",
"react-router-dom": "^4.2.2",
"react-s3": "^1.2.4",
"react-s3-uploader": "^4.8.0",
"react-scripts": "1.1.1",
"react-stay-scrolled": "^2.1.1",
"sfcookies": "^1.0.2",
"socket.io-client": "^2.1.0"
},
"scripts": {
"start": "set PORT=3001 && react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
}
}
do you have any idea why this happened?